U.S. drought crisis

Associated Press
A towboad and its barges pass under the old Mississippi River bridge at Vicksburg, Miss., Thursday, July 26. 2012. in a switch of extremes, the river has dropped to very low levels this summer unlike last year when the river was flooding much of the Delta due to record high levels. The drop in water level now exposes the river bottom, forcing river traffic to a trickle as barges are forced to lessen their loads to keep from getting stuck on sandbars. (AP Photo/Rogelio V. Solis)

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Triple-digit temperatures and weeks without rain withered and destroyed many crops in the Midwest, sending commodity soybean and grain prices soaring in 2012.

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